Air quality (AirLink)
Show live AQI and particulate readings from your Davis AirLink sensor.
If your WeatherLink account includes a Davis AirLink air-quality sensor, your site can show live particulate readings and a colour-coded air-quality index - no extra setup beyond connecting your account.
What visitors see
- An Air quality tile in the Overview grid and a dedicated Air quality tab.
- The current AQI with a colour-coded health category, on the band scale of whichever standard you chose, showing where the current reading sits.
- The main pollutant (PM2.5 or PM10) behind the current index.
- Live PM1, PM2.5 and PM10 concentrations in µg/m³.
- A historical chart of air quality over time, with the same range switcher as the other tabs.
Choosing an AQI standard
Different regions score air quality differently, so you can pick the scale your visitors know, under Settings → Cards & stations → Air Quality Index standard:
| Standard | Where it is official | Scale |
|---|---|---|
| European AQI (EEA) (the default) | European Union | Six bands, Good to Extremely poor |
| US EPA AQI | United States | The familiar 0-500 index |
| UK Daily Air Quality Index | United Kingdom | 1-10 in four bands (COMEAP) |
| Common AQI (CAQI) | European cities | 0-100, urban-background scale |
| Canada AQHI | Canada | Health-risk index, 1-10+ |
| Australia NEPM | Australia | Ratio scale where 100 is the national standard |
| Luchtkwaliteitsindex (LKI) | Netherlands | 1-11 |
| BelAQI | Belgium | 1-10, every level with its own name |
Whichever you pick, the index is computed from your own PM2.5 and PM10 readings, and the worse pollutant sets the headline. The colour scale, the category names and the chart all follow the standard you chose.
Canada's AQHI needs PM2.5
The published AQHI formula has no PM10 term at all, so a sensor that only reports PM10 shows no index under that standard. Every other scale works from either pollutant.
A note on averaging
Most of these indexes are officially defined on a 1-hour or 24-hour mean; your station reports a live value, so what you see tracks the standard's breakpoints right now rather than a regulatory determination. The dashboard tells you which averaging period each standard is defined on when you pick it.
Getting the sensor detected
Air quality comes from a Davis AirLink, or from Ecowitt-protocol hardware (a WH45 or WH46 module, which also reports CO2).
AirLink is discovered automatically when you connect WeatherLink. If you add an AirLink later, open Connection and choose Reconnect & rediscover; the air-quality tile and tab appear as soon as particulate readings arrive.
Alert on poor air
With an AirLink you can also add a PM2.5 above threshold to your email alerts, so you hear about poor air even when you're not watching the site.